Question

what mass of a gas of molecular mass 30 occupies a volume of 80 ml at 27°C and under 3 atm pressure? (R=0.082Latm/k mol)​

Answer 1

Answer:

what mass of gas of molecular mass 30 occupies a volume of 80ml at 27° C and under 3 atom pressure?(R = 0.082 Latm / Kmol)

Answer 2

Given - Molecular weight - 30 g/mol

Volume - 80 ml - 0.08 litre

Temperature - 27°C - 300 K

Pressure - 3 atm

R=0.082 Latm/k mol

Find - Mass of gas

Solution - Using ideal gas equation to find the mass of gas. The formula is - PV = nRT, where p is pressure, v is volume, n is number of moles, R is gas constant and T refers to temperature.

Number of moles is calculated as - weight/molecular weight.

Keeping the given values in equation-

PV = wRT/M

W = PVM/RT

W = (3*0.08*30)/(0.082*300)

W = 7.2/24.6

W = 0.29 or 0.3 gram

Hence, mass of gas is 0.3 gram.